<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1 user-scalable=no">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>登录</title>
    <!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
    <script src="https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js"></script>
    <!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"></script>
    <!-- Bootstrap -->
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">

    <!-- HTML5 shim 和 Respond.js 是为了让 IE8 支持 HTML5 元素和媒体查询（media queries）功能 -->
    <!-- 警告：通过 file:// 协议（就是直接将 html 页面拖拽到浏览器中）访问页面时 Respond.js 不起作用 -->
    <!--[if lt IE 9]>
    <script src="https://cdn.jsdelivr.net/npm/html5shiv@3.7.3/dist/html5shiv.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/respond.js@1.4.2/dest/respond.min.js"></script>
    <![endif]-->
    <script type="text/javascript">
        function refresh() {
            document.getElementById('captcha_img').src="/kaptcha?"+Math.random();
        }
    </script>
</head>
<body>
<div class="container">
    <form class="form-signin" >
        <h2 class="form-signin-heading">用户登录</h2>
        <label for="inputusername" class="sr-only">用户名</label>
        <input type="text" id="inputusername" class="form-control" placeholder="输入用户名" required>
        <label for="inputPassword" class="sr-only">密码</label>
        <input type="password" id="inputPassword" class="form-control" placeholder="请输入密码" required>
        验证码:  <input type="text" id="verifyCodeActual" placeholder="请输入验证码" name="verifyCodeActual">
        <div class="item-input">
            <img id="captcha_img" alt="点击更换" title="点击更换" onclick="refresh()" src="/kaptcha" />
        </div>
        <button class="btn btn-lg btn-primary btn-block" type="submit">确定</button>
    </form>
</div> <!-- /container -->

<script>
    $(document).ready(function(){
        $(".btn").on("click",function(){
            $.ajax({
                url:"http://localhost:8081/getUser",
                type:"GET",
                data:{
                    "username":$("#inputusername").val(),
                    "password":$("#inputPassword").val(),
                    "verifyCodeActual":$("#verifyCodeActual").val()
                },
                success:function (data) {
                    if("codefail" == data.codefail){
                        alert("验证码错误")
                        return false;
                    }
                    if ( "success" == data.success){
                        alert("登录成功");
                        return false;
                    }else {
                        alert("用户名或密码不正确");
                    }
                }
            })
        });
    });
</script>
</body>
</html>